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A current of 10A is employed to plate ni...

A current of `10A` is employed to plate nickel in `NiSO_(4)` bath. The current efficiency with respect to `Ni` plating is `60%`.
`a.` How many grams of `Ni` is plated on the cathode per hour ?
`b.` What is the thickness of the plating if the cathode consists of a sheet of metal `4.0 cm^(2)` which is coated on both faces ?
`c.` What is the volume of `H_(2)(STP)` evolved during above electrolysis ?

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